Test rack



F. B. THOMAS Dec. 28, 1937.

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ATTORNEY v Dec. 28, 1937.

F. B. THOMAS TEST RACK 6 Sheets-Sheet 2 Filed April 27, 1935 l\ lllg\ lINVENTOR FRANK B-THOMAS BY ATTORNEY mk. w

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Dec. 2s, 1937. F, B, THbMAS 2,103,305 f I TEST RACK Filed April 27, 19356 Sheets-Sheet` 3 INVENTOR FRANK B.THOMAS BY wwf@ ATTORNEY Dec. 28,1937.

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TEST RACK Filed April 2v, 1935 a sheets-sheet 4 f if 2;

lNvENToR FQANK E .THOMAS BY%W/ ATTORNEY Dec. 28, 1937. F. B. THOMAS2,103,305

` TEST RACK Filed April 27, 1935 e sheets-sheet l 33 47454/ c? -FI I 4 f4 F0 44 J 30 /f/l/ /6 46/ T/@ f4? 26L |5462/ 23;22 ,3 29 a 2 l xNYlH I25 4160/5' f O /V' 26.

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Filed April 27, 1935 6 Sheets-Sheet 6 Patented Dec. 28, 1937 UNiTEDSTATES TEST RACK Frank B.` Thomas, Irwin, Pa., assignor Yto TheWestinghouse Air Brake Company, Wilmerding, Pa., a corporation ofPennsylvania Application April 27, 1935, Serial No. 18,604`

Y 22 Claims.

Patent No. 2,031,213, issued February 18, 1936.

VOne object of this invention is to provide' a testing device orapparatus adapted to be employed `to test brake controlling rvalvedevices, and which will show promptly and accurately whether the valvedevices tested are up to the proper standard of workmanship and generalcondition, and if not, where they deviate from the standard.

Another object of the invention is to provide a testing device adaptedto be employed to test brake controlling valve devices of the typehavlng a service portion and an emergency portion, and having means toadapt the testing device to accommodate either of these portions.

A further object of the invention is to provide a testing device adaptedto test a brake controlling valve device of the type having a bodyhaving a plurality of passages therein communicating with ports in oneface thereof, the testing device having amember having a plurality ofpassages therein and having testing equipment associated therewith, thepassages being adapted to be connected to the ports in the brake valvebody whereby the condition of the brake control-v ling valve device maybe tested.

A further object of the invention is to provide a testing device adaptedto test the service and emergency portions of a brake controlling valvedevice, each of which portions `has a body having a plurality ofpassages therein communicat-v ing with ports in one face of the body,the testing device having a bracket member having a plurality ofportsfin a face thereof, and having passages communicating with saidports and having testing equipment associated with said passages, andmeans adapted to be interposed between a brake controlling valve deviceportion to be tested and the bracket member of the test de vice toestablish communication between *the ports in the valve body and thebracket member.

Another object of the invention is to provide a testing device adaptedto be employed to test brake controlling valve devices, and havingreservoirs analogous to the auxiliary and emergency reservoirs, and areservoir analogous to the brake cylinder, together with means toconnect these reservoirs with the proper portions oi the brakecontrolling valve Vdevice being testedandhaving Y indicating equipmentassociated with selected V ones of the passagesA inthe testingapparatus, whereby pressure conditions in said passagesmay be observed.j'

A further object of the invention is 'to provide a testing device havinga 4bracket memberhaving a plurality of ports yin aVfaceithereof,-theibracket' member beingadapted to have ab-rake'control-' ling valve ldevice portion to be tested secured 1Uthereto, and having means to maintain thelorakeV controlling valve.device piston in Va -predeter mined position `relative ito the brakecontrolling valve device body during testing of the1fvalve fdeviceportion. i t

Other objects of the vinvention and features #of novelty will be'apparent iromzthe following description taken in connectionwith the:accompanying drawings in which,v

Fig. 1 is a diagrammatic view of one Vemb'odi- 20 ment of the testingapparatus provided by my invention, Vtogether with a sectionaldiagrammatic View of 'the service .portionpf abrake con? trolling valvedevice in position to be tested,.the

piston of the brake controlling valve `device be- 25 ing shown in therelease and charging position;

Fig. 2 is a diagrammatic view `of the ,testingV apparatus provided bymyV invention, together;

with ya sectional diagrammatic view 'of the emergency .portion offabrake controlling'valv'e device 301 in position to be tested, thepiston of the` brake.;V

controlling valve device'ebeingsh'own inthe Vre.-

lease and charging position; u

Fig. 3 is an elevationalview of :the end face' of the service portion ofla brakexcontrolling'valve 52 device of the type adaptedtoibe tested'Vby theV equipment provided `by this invent-ionzand'showing thearrangement of the ports in the'valve body;

Fig. 4 is an elevational viewof a face of theA 0'? service portion llingpiece employed withvthe testing apparatus provided by this invention,the face shown vbeing that which lies adjacent the face of the serviceportionshownxin Fig. 3;

Fig. 5 is an elevational viewof the opposite face v of the filling pieceshown in Fig.` 4,' the'fface shown being adapted to lie adjacent totheface of the bracket member shown in Fig. 6; f e

Fig. 6 is an elevational view ici; a facefoi the?, bracket -memberemployed inthe testing device 5pt provided by my invention-,showing the:arrangement of the .ports in this member, the face shown being thatwhich is adapted talla-ve thej lling .pieceslie thereagainstjy- Y f i 1erfrizia'l"l OFFICE f V2.- A -Vg the end face of the emergency sectionof a brake controlling valve device of the type which the testing deviceprovided by my invention is designed to test;

Fig. 8 is a view similar to Fig. 4 and showing a face of the fillingpiece employed in testing an emergency section, the face shown beingthat which lies adjacent to the emergency section;

Fig. 9 is a View similar to Fig. 5 and showing the opposite face of thefilling piece shown in Fig. 8, the face shown being adapted to lieadjacent to the face of the bracket member shown in Fig. 6,'

Fig. 10 is a top plan view of the bracket member employed with thetesting device provided by my invention, with parts broken away andshown in section to more clearly reveal other parts;

Fig. 11 is an elevational view of the piston stop stem employed with thebracket member in the testing device provided by my invention, the horseshoe or locking member employed with the stem being shown in place;

- Fig. 12 is a view of the piston stop stem taken substantially from theline |2-I2 of Fig. 11;

Fig. 13 is an elevational view of the leakage indicating apparatus whichis employed in connection with the testing apparatus provided by thisinvention;

Fig. 14 is a sectional diagrammatic view of the service portion of abrake controlling valve device of the type which this equipment isdesigned to test, the piston and slide valve of the valve device beingshownin the service position; o

Fig. 15 is a sectional diagrammatic view of the emergency portion of thebrake controlling valve device of the type which this apparatus isdesigned to test, the piston and slide valve of the valve device beingshown in the emergency position; and

Fig. 16 is a view similar to Fig. 15 and showing the valve device withthe piston and slide valve moved to the accelerated emergency releaseposition.

Referring to the drawings, the testing apparatus provided by myinvention is shown diagrammatically in Figs. 1 and 2, the apparatusbeing shown in Fig. 1 in connection with the service portion of a brakecontrolling valve device of the type which the apparatus is designed totest, and beingshown in Fig. 2 in connection with the emergency portionof the brake controlling valve device. Y

The brake controlling valve device which the test apparatus provided bythis invention is designed to test comprises a service portion, shown insection in Fig. 1 of the drawings, and having a casing indicatedgenerally by the reference character I Il, and an emergency portionshown in Fig. 2 of the drawings, and having a casing indicated generallyby the reference character II. The service and emergency portions aresecured to opposite faces of a pipe bracket portion (not shown), and thefaces of the service and emergency portions each have a plurality ofports therein, which when the portions are in position against the facesof the pipevbracket portion, are adapted to communicate with ports inthe faces of the pipe bracket section.

The service portion casing has a piston chamber I5 formed therein andvcontaining a piston I6, and on the opposite side of the piston is avalve chamber I1 which, when'the valve device is in service, isconnected with an auxiliary reservoir by way of a passage 20. Thevalvechamber |1'als'o contains a main slide valve 2| and an auxiliary slidevalve 22 adapted to be operated by the piston through the piston stem23. The valve chamber also contains a return piston 25 which is engagedby the end of the piston stem 23, and which is urged to the right, asviewed in Fig. 1 of the drawings, by the return spring 26. The pistonstem 23 has a plungerV 28 associated therewith and engageable with theend of the slide valve 2 I. Movement of the plunger 28 is opposed by thespring 29.

The service portion also includes a release bypass check valve 3D, andan application by-pass check valve 3 I, the chamber 33 between the checkvalves being connected by way of the passage 34 to a port in the face ofthe body of the valve portion, while the chamber 36 on the right handside of the application by-pass check valve 3|, and the chamber 31 onthe left hand side of the release by-pass check valve 30 are connectedby way of the passage 38 with a port in the face of the valve portionbody, and are connected by way of the branch passage 39 with a port inthe seat of the main slide valve 2 I.

The service portion also includes a release insuring valve devicecomprising a diaphragm 4|, subject on one side to the pressure of theHuid in the chamber 31, which when the valve is in service, is the sameas the pressure of the uid in the brake pipe, and which is subject onthe other side to the pressure of the iiuid in the chamber 43, which isconnected by way of the passage 44 with the valve chamber I1. Thediaphragm 4| controls a valve 45 which is normally urged to seatedposition by a spring 41, and which controls communication between thechamber 43 and a passage 48 having a choke 48a interposed therein. Thepassage 48 leads to a port in the seat of the main slide valve 2 I, andwhich, in one position of the slide valve 2|, is connected by means ofthe cavity 49 in the slide valve with a passage 50 which leads from theseat of the slide valve to a port in the face of the body of the valveportion.

The service portion also includes a limiting Valve device comprising adiaphragm 52 subject on one side to the pressure of a spring 53 which ismounted in the chamber 54 which communicates with the atmosphere by wayof a passage 55. The diaphragm 52 is subject on the other side to thepressure of the fluid in the chamber 56 which communicates with a porton the face of the valve body by way of Ypassage 51. This passage whenthe valve portion is in service communicates with the brake cylinder.The diaphragm 52 controls a valve 58 which is engageable with a seat rib59 and which controls communication between a chamber 60 andthe chamber5B, while a backilow check valve 6| controls communication between thechamber 58 and a passage 62, having a choke 62al interposed therein,which leads from a port in the seat of the slide valve 2|, and which,

in one position of the slide valve, is connected by Y way of the cavity63 with the passage 39.

The service portion also has associated therewith a duplex release valvedevice comprising a valve element 65, which is urged to its seat by aVspring 66, and controls communication between a chamber 68 and theatmosphere. The chamber 68 is connected by way of passage 1i) with thevalve chamber I1. The release valve device also includes a valve'element1I which is urged to its seat by spring 12 and controls communicationbetween a chamber 13 and the atmosphere. The chamber 13 is connected byway of the passage 14 with a port in the seat'of the slide valve 2| andwith a port in the face of the body of the valve portion, which when thevalve portion is in service communicates with the emergency reservoir.The valve elements 65 and 1| are moved away from their seats by means ofthe plunger 16 which has a pair of stems 11 and 18 which are engageablewith the valve elements, while the plunger 16 is actuated by the handle19.

The valve body has a pair of feed grooves and 8| formed therein andcommunicating with the piston chamber i5 and the Valve chamber I1. Thefeed groove 8| is somewhat shorter than the feed groove 80, and isarranged so that communication between the piston chamber |5 and thevalve chamber |1 through the feed groove 8| is cut o when the piston I6is moved to the extreme left hand position as viewed in Fig. l of thedrawings.

The service portion body also has a passage 83 formed therein, andcommunicating with a port on the face of the body portion and with aport in the seat of the slide valve 2 I. device is in service thispassage communicates with the brake cylinder.

The service portion also includes `a quick service volume 86 whichcommunicates with a port in the seat of the slide valve 2| by way of thepassage 88, and with the atmosphere by way of the passage 89 which hasthe choke 85 interposed therein.

The emergency portion comprises a piston |00 having a piston chamber |0|at one side thereof and having a valve chamber |62 at the other sidethereof. The valve chamber contains a main slide valve |63, and anauxiliary or graduating slide valve |64 which are adapted to be operatedby the piston |66 through the piston stem |06.

The valve chamber |02 also contains a return piston |01 which is engagedby the end of the piston stem |06 and is urged toward the right, asviewed in Fig. 2 of the drawings, by the spring |09. The piston stem hasa plunger ||0 associated therewith and engageable with the end of themain slide valve |63. Movement of the plunger I i0 is opposed by thespring I I I.

The emergency portion also has associated therewith an acceleratedrelease piston I I4, which is subject on one side to the pressure of thefluid in the valve chamber |62, and which is subject on the other sideto the pressure of the fluid in the chamber I I5, which is connected toa port in the seat of the slide valve |03 by way of the passage I I6which has a choke I I1 interposed therein. .A plunger I|8 is carried bythe piston ||4 and this plunger is urged to the right, as viewed in Fig.2 of the drawings, by means of the springs I I9 and |20 which extendbetween the piston ||4 and a washer or disk |2| tted on theplunger I I3.

The emergency portion has a vent valve device associated therewith andcomprising a piston |25, which is subject on one side to the pressure ofthe i'luid in the chamber |26 which communicates by way of a passage |21with a port in the seat of the slide valve |03. cates with theatmosphere by way of a passage |28, while the piston |25 is adapted toengage a seat rib on a gasket |30 to cut off communication between thechamber |26 and the passage |28, except for communication through arestricted passage |3| extending through the piston. The emergencyportion body has the groove |33 formed therein, which permitscommunication from the chamber |26 around the piston |25 when the pistonis in the position shown in Fig. 2 of the drawings.

The piston |25 hasV a Astem When the valve The chamber |26 also communi-|35 formed integral therewith and this stem has avalve |36 mounted onthe end thereof. The valve |36 is held in en-V gagement with a seat rib|38 by means of a spring |39 so as-to cut off communication between achamber |40 and the atmospheric passage |28. The chamber |40communicates with a port on the face of the emergency valve portion bodyby way of a passage |4|. The valve |36 has a port |42 formed thereinwhich, when the valve |36 is in the position shown in Fig'. 2 of thedrawings, permits communication betweenthe passage |4| and the chamber|40.

The emergency portion also includes an accelerated release check valvedevice comprising a ball check valve |45 which engages a seat formed onthe body of the valve device and the valve element |46 which is held inengagement with a seat rib |41 by means of a spring |48. Thevalves |45and` |46 control communication between the passage |50, which leadsiroma port inthe seat of the slide valve |03, and the valve chamber |5|which communicates with the passage |4| by way Y with aseat rib |59 b-ymeans of aspring |58. The

valves |55 and |56 control communication between the valve chamber |02and the chamber |60 by way of a restricted port I6 I. The chamber |60communicates with a port in the seat of the slide valve by wayl of apassage |62, which also communicates with a port in the face of thevalve body.

The valve chamber |02 communicates with a port on the face ofthe valveVbody by way of the passage |65. The passage |65 communicates with thepiston chamber |0| on the'right hand side of the piston |00 by way ofthe charging choke |66, and communication between the passage |65 andthe piston chamber |0I through the choke |66 is cut off when the piston|00 is moved to the right from the position in which it is shown in Fig.2 to the emergency position, which is the position in which the pistonis shown in Fig. 15 of the drawings.

An atmospheric exhaust passage |10 isY provided which communicates witha port in the seat of the slide valve |03 and with the exhaust. passageThe emergency portion has an inshot piston device associated therewithand comprising a piston |15, which is mounted in a chamber |16, andwhich is normally urged into engagement with a seat rib |18 by means ofa spring |11. Communication between the chamber |16 and the chamber |19outwardly of the seat rib A|16 isV which communicates by way of the-passage |86Y with the chamber |88, and by way of passage |89 with thepassage |90 which communicates vwitha port on the face of the bodyportion.

The piston |15 has aistem |95 associated therewith and having a valveelement` |96 tted -on the endthereof. Thevalve-element |.96tisadapt- Thepiston' ed to engage the seat rib |98 to' control com`- municationbetween a chamber |99 and the chamber |88 by way of passage 200. Thevalve element |96 is normally urged into engagement with the seat rib|98 by means of a spring 20|. A restricted passage is provided betweenthe chamber |99 and the chamber |88 by way of the choke 203.

The chamber |16 communicates with a volume chamber |92 by way of thepassage |93, while the chamber I 92 communicates with a port in the seatof the slide valve |03 by way of the passage |94.

The emergency valve section has a timing valve device associatedtherewith and comprising a diaphragm 2|9, which is subject on one sideto the pressure of the uid in the chamber 2|| which communicates 'by wayof the passage 2| 2 with the slide valve chamber |02. The diaphragm 2|0has a valve 2M associated therewith, and normally held in engagementwith a seat rib 2|5 so as to cut off communication between the chamber2|1 inwardly of the seat rib 2| 5 and the chamber 218 outwardly f theseat rib 2|5. The chamber 2|8 communicates with the passage |90 througha choke 22|), while the chamber 2!| inwardly of the seat rib 2| 5communicates with a port on the face of the valve body by way of thepassage 222, which has a branch passage 223 leading therefrom andcommunicating with a port on the seat of the slide valve |03. Thediaphragm 2|0 is urged to the left, as viewed in Fig. 2 of the drawings,by the pressure of the fluid in the chamber 2|1 inwardly of the seat rib2| 5 and bythe pressure of the fluid in the chamber 2|8 outwardly of theseat rib 2|5, and is urged to the right as viewed in Fig. 2 of thedrawings by the pressure of the fluid in chamber 2| v The sectionalviews of the service and emergency portions of the valve device shown inFigs. 1 and 2 of the drawings are diagrammatic and, as actuallyconstructed, the ports on the faces of these valve portions are notarranged in the same plane as shown in these giu'es of the drawings, butare arranged around the piston chambers in each of the valve devices.The arrangement of the ports which is employed in the actualconstruction of the service portion of the valve device is shown in Fig.3 of the drawings, the ports being identied by reference numerals whichcorrespond to the numerals employed on the passages leading to theseports. Similarly, the arrangement of ports employed in the actualconstruction of the emergency portion of the valve device is shown inFig. '7 of the drawings, these ports being identified by referencenumerals which are the same as the numerals employed on the passagesleading to these ports.

Each of these valve portions has, in addition to the ports formed in theface thereof, a plurality of bolt holes extending therethrough andindicated on the face of the service portion in Fig. 3 by referencenumerals 230, and on the face of the emergency portion in Fig. 7 by thereference numerals 235. Bolts, by means of which the valve portions aresecured to the pipe bracket, extend through these holes.

The test apparatus provided by my invention employs a bracket memberwhich is shown diagrammatically in Figs. l and 2 of the drawings, and isshown in greater detail in Fig. 10 of the drawings. The bracket memberVis indicated generally by the reference character 250, and has a face25| having a plurality of ports therein which" communicate with passagesin the body of the bracket to which are attached pipes which communicatewith the test apparatus in a manner to be described in detail below.

The bracket 250 is provided with a foot portion 253 by means of whichNthe bracket may be secured to a support such as the top of a bench.

In the diagrammatic showings of the bracket member in Figs. 1 and 2, thepassages are shown as extending directly through the bracket member, butin the actual construction employed, the face 25| of the bracket memberis located on one side of the bracket member, and the passages in themember are curved and are carried out of the bracket at the back of themember, thus leaving the face of the member opposite the faceV has ttedtherein a substantially tubular member 261 formed of a suitabletransparent materlal, such as glass. An annular gasket 268 is positionedbetween the inner end of the glass member 201 and the cover 260, while agasket 269 is positioned between the opposite end of the transparentmember 261 and the face of the bracket member 250.

Means is provided to detachably secure the cover 260 in place, and thismeans comprises a yoke 21| pivotally secured by means of bolts 213, onears 214 which project from the bracket member 250. The yoke 21| has ahand wheel 215 associated therewith, which is mounted upon a threadedstem 216 which is tted in a threaded opening in the yoke 21|, and whichhas a rounded end portion 211 which is adapted to engage a curved recessin the face of the cover 26|).l

When the hand wheel 215 is turned so as to press the end 211 against thecover 260, the cover 260 is held firmly in place on the face of thebracket 250, and the gasket 259 serves to prevent the escape of iluidfrom the chamber dened by the cover to the atmosphere.

When it is desired to remove the cover, the hand wheel 215 is revolvedin a direction to move the end 211 of the threaded stem away from thecover 209. When the end of the stem has been moved out of engagementwith the cover, the yoke 21| is pivoted on the bolts 213 so as to bemoved out of the way of the cover 260. The cover can then be removed.

The opening 255 through the bracket member is positioned so as to besubstantially in alignment with the piston of the valve devices to betested when these devices are secured to the bracket member. Suitablepiston stop stems of the type shown in Fig. 11 of the drawings areprovided, and each comprises a stem 280, having a threaded end portion28| adapted to be screwed linto a threaded'opening in the face of thepiston of the valve device. The stem 280 then extends through theopening 255 in the bracket member, and has an annular portion of reducedThe annular groove 282 is adapted to receive a horseshoe or lockingmember 281 which engages the face of the bracket 258, as shown in Fig.10 of the drawings, to prevent movement of the piston stem 286 upwardlybeyond a predetermined position, as viewed in Fig. 10 of the drawings.

The relative position of the piston stop stem and therefore of thepiston to which the stem is secured, may be determined. by the operatorby observing the position of the piston stop stem through the windowswhich are provided in the cover 260.

The bracket member 256 has a plurality of passages extendingtherethrough, these being shown diagrammatically in Figs. l and 2 of thedrawings as being arranged in a single plane. The actual arrangement ofports Vemployed is shown in Fig. 6 of the drawings.

The passages in the bracket member are identied by the referencenumerals 29|v to 298, inclusive, and. the ports associated with thesepassages are indicated in Fig. 6 of the drawings by similar referencecharacters.

The bracket member 259 is also provided with a plurality of apertures36| extending therethrough, as shown in Fig. 6 of the drawings, andadapted to receive bolts associated with the lling pieces as describedin detail below, the bolts being shown in section.

The testing apparatus provided by my invention comprises a plurality ofreservoirs including a reservoir 326, which is analogous to theauxiliary reservoir employed on a railway vehicle, a reservoir 32| whichis analogous to the emergency reservoir employed on a railway vehicle,and a reservoir 322 which is analogous to a brake cylinder. A reservoir325 which is analogous to the main reservoir employed upon a locomotiveis also provided, and is normally maintained charged to a pressure of 80pounds with fluid under pressure supplied through a feed valve 326 fromany suitable source of fluid, such as the supply reservoir 321.

The test apparatus also includes a reservoir 329 which is analogous tothe brake pipe on a railway vehicle, and a reservoir 33D which isanalogous to the quick action chamber which is incorporated in the pipebracket portion of a valve device of the type which this apparatus isdesigned to test.

A pair of operating valves are provided to control the supply andrelease of uid under pressure to and from Various portions of the testapparatus. These operating valves are indicated by the referencenumerals 335 and 336, and may be of any suitable well knownconstruction.

The operating valve 335 is connected with the main reservoir by way ofthe pipe 340, and is connected with the brake pipe reservoir 329 by wayof the pipe 34|, and is provided with an atmospheric exhaust passage352. The operating valve 335 is provided with an operating handle 338which may be moved to eight operating positions, including positionsNos. 1 and 2 in which fluid under pressure is supplied to the brake pipereservoir 329 through the pipe 34|, the communication through thevalvebetween ythe main reservoir and the pipe leading to the brake pipereservoir being through a 1/4" port when the operating handle 338 is inthe No. l position, and being through a gli port when the operatinghandle is in the No. 2 position. The valve is constructed so that whenthe handle is moved to the Nc. 3 position, the flow of fluid to and fromthe brake pipe reservoir, and from the main reservoir is cut off. Thismay betermed the lap position of the valve.

The operating valve 335 has a plurality of positions in which fluid maybe released from the brake pipe reservoir 329 through a graduated seriesof ports, these positions being identied as positions Nos. 4 to 8inclusive. In the No. 4 position the brake pipe reservoir 329communicates with the .atmosphere byY way of the atmospheric exhaustVpassage 332 through a ele" port, while in the No. 5 position, the brakepipe reservoir ycomf municates with the atmosphere through a port formedyby a No. 45 drill (.082" in diameter), and in the No. 6 position, thebrake pipe reservoir is connected to the atmosphere through a portformed by a No. 32 drill (.1167' in diameter). In the No. position ofthe operating valve 335,

the brake pipe reservoir is connected to the at-Y mosphere through aport formed by a No. 27

drill (.144" in diameter), and in the No. 8 po- Y sition the brake pipereservoir is connected to the atmosphere through a 3%" port. Y Y

The operating valve 336 controls passagesleading to the upper andlowerends of the manometer which is indicated generally by the referencecharacter 350. The valve 336 is connected with the pipe`34| leading tothe brake pipe rservoir 329 by way,V of lthe pipe 35|, and isrconnectedwith the auxiliary reservoir 320 by way of the pipes 352, 440, and 442.A pipe 353 connects the pipe 340 leading from the main reservoir 325with a chamber in the valve 336 above the rotary valve The valve 336V isprovided with an operating handle 339 which is movable between twopositions, one` of these positions being the cut-in position in whichthe top Vof the manometer is connected to the auxiliary reservoir 320,and the bottom of the manometer is connected to the brake pipe reservoir329. The other position of the handle 339 is the cut-out position and inthis position of the handle the top and bottom of the manometer areconnected to the atmosphere.

As shown in the drawings the manometer 350 comprises a bottom tank 36|`adapted to hold a quantity of liquid, such as water, and a top tank 362which is also adapted to hold a quantity'of sure of the fluid in thebottom tank, liquid from this tank is forced up into the glass tubejoining the Vtop and bottom tanks, the level to whichV the liquid isforced being determined by' the differ-V element employed in the valveso as to maintain ence in the pressures Vin the two tanks. In this.;

manner the difference in the pressures present in the'top and bottomtanks and in the chambers to which these tanks are connected may bedetermined.

The brake pipe reservoir 329 is connected with the passage 298 in thebracket member 250 by Way of the pipe 310, and the pressure of the fluidv in the pipe 310'and the reservoir 329 isY indicated by the gage 31|.

The quick action chamber reservoir 330 is connected with the passage 291in the bracket member 250 by way of a pipe 313. Communication betweenthe quick action chamber reservoir and the pipe 313 is controlled bymeans of the valve 315. A gage 316 is connected to the quick actionchamber reservoir 330 and registers the pressure of the iluid in thisreservoir.

The pipe 352 leading from the valve 335 communicates with the pipe 313at a point intermediate the valve 315 and the bracket member 250, andcommunication through this pipe is controlled by means of the valve 311.A valve 318 controls a passage leading to the atmosphere vfrom the pipe352 at a point intermediate the valve 311 and the bracket member.

A pipe 380 is also provided and communicates with the pipe l310 and withthe pipe 352 at a point intermediate the valve 311 and the operatingvalve 33B, and communication through this pipe is controlled by means ofthe valve 332. A valve 384 is provided and controls communicationthrough a passage communicating with the atmosphere and with the pipe352 at a point intermediate the valve 311 and the operating valve 336. Agage 386 is provided and communicates with the pipe 352 at a pointintermediate the valve 311 and the operating valve 336, and indicatesthe pressure of the iiuid in this portion of the kpipe 352, and also inthe auxiliary reservoir 320 which is connected With the pipe 352 by wayof the pipe 440. The pipe 388 connects the passage 296 in the bracketmember 250 with the pipe 380 at a point intermediate the valve 382 andthe pipe 310. A valve 390 1s interposed in this pipe and controlscommunication through the pipe, while a gage 39| is associated with thepipe 388, being connected thereto at a point intermediate the valve 390and the bracket member 250, to indicate the pressure of the iiuid in thepipe 388.

A gage 395 is also provided and communicates with the pipe 340 at apoint intermediate the main reservoir 325 and the operating valve 335 toindicate the pressure of the fluid in this portion of the pipe 340. Thepipe 398 is connected with the passage 295 in the bracket member 250 andextends between the bracket member and the pipe 340. Communicationthrough this pipe is controlled by valves 399 and 409, while a valve 40|is provided and controls a passage communicating with the atmosphere andwith the pipe 398 at a point intermediate the Valve 399 and the bracketmember 250. The valve 40| is provided with a terminal member 403 havingan opening therein adapted to receive the nozzle of the leakageindicator shown in Fig. 13 of the drawings. A gage 405 is provided andcommunicates with the passage 398 at a point intermediate the valve 399and the bracket member 250 and indicates the pressure of the uid in thisportion of the pipe 398.

A pipe 498 communicates with the emergency reservoir 32| and with thepipe 398 at a point intermediate the valves 399 and 400.

The passage 294 in the bracket member 250 has a pipe 4|0 associatedtherewith, and communication through this pipe between the passage inthe bracket member and the atmosphere is controlled by means of a valve4| This valve has a terminal member 4|2 associated therewith nozzle ofthe leakage indicator.

kvalves 4|5 and 4|8.

A pipe 4|4'is connected with the passage 293 in the bracket member andwith the pipe 340, communication through the pipe 4|4 being controlledby means of Valves 4|8 and 4|8. The brake cylinder reservoirr322communicates with the pipe 414 at a point intermediate the valves H5 and4|8 by way of a pipe 420.

A valve 42| is provided and controls communication between theatmosphere and the pipe 4|4 at a point intermediate the valve 4|5 andthe bracket member 250. The valve 42| has a terminal member 422associated therewith having an opening therein adapted to receive thenozzle of the leakage indicating device. The valve 424 controlscommunication between the atmosphere and the pipe 4|4 at a pointintermediate the A gage 425 communicates with the pipe 4|4 at a pointintermediate the valve 4.45 and the bracket member 250 and indicates thepressure of the iiuid in this portion of the pipe 4|4.

A pipe 428 extends between the passage 292 in the bracket member 250 andthe pipe 420, and communication through this pipe is controlled by thevalve 429. A gage 430 is connected with the pipe 428 at a pointintermediate the valve 429 and the bracket member and indicates thepressure of the fluid in this portion of the pipe 428. A branch pipe 43|communicates with the pipe 429 at a point intermediate the valve 429 andthe bracket member 250 and with the pipe 349, communication through thispipe being controlled by means of a valve 432.

The passage 29| in the bracket member 250 has a pipe 449 associatedtherewith and communicating with the pipe 352 at a point intermediatethe valve 311 and the operating Valve 33E. A pipe 442 communicates withthe pipe 440 and with the auxiliary reservoir 329, communication throughthis pipe being controlled by means of the valve 443.

The pipe 340 has a valve 45| interposed therein at a point intermediatethe pipe 445 leading from the main reservoir 325 and the pipe 43|. AValve 450 controls communication between the pipe 340 and the atmosphereat a point intermediate the valve 45| and the pipe 43|.

Communication between the main resevoir 325 and the pipe 340 iscontrolled by means of a valve 445, while communication between the feedvalve device 326 and the main reservoir 325 is controlled by means of avalve 441. rThe valves 445 and 441 remain open at all times duringoperation of the test apparatus provided by this invention.

In order to adapt this apparatus to test either a service portion of thebrake controlling valve device or an emergency portion of the brakecontrolling valve device, a pair of lling pieces or adapters areprovided, and these are adapted to be interposed between the face 25| ofthe bracket member 258 Yand the valve portion to' be tested. These llingpieces are indicated by the reference numerals 415 and 416, the lli-ngpiece 415 being adapted for use in testing the service portion of avalve device, and the 'filling piece 416 being adapted for use intesting the emergency portion of a valve device.

As is shown in the drawings, the filling piece 415 comprises asubstantially fiat body having generally parallel faces, and having aplurality of passages extending therethrough adapted to communicate withports in opposite faces of the body. This lling piece has a plurality ofthreaded openings 418 therein, (see Figs. 4 and 5), in which are securedbo1ts,'shown in section, which are adapted'to extend 'through theopenings 39| in the bracket member 259 (see Fig. 6) by means of whichthe lling piece 515 is secured in place against the face 25| of thebracket member.

In addition, the lling piece 415A has threaded openings, 419 formedtherein, (see Figs. 4 and 5), in which are adaptedto be secured bolts,shown in section, which extend through the bolt holes 239 in the serviceportion of the valve device (see Fig. 3) to hold this portion of thevalve device in position against the face of the filling piece. Suitablegaskets 480 and 48| are positioned between the body of the valve device-an-d filling piece, and between the llingppiece and the face of thebracket member to prevent the escape of fluid under pressure through thejoints between these members.

The passages in the iilli-ng piece 415 include a passage 485 which isadapted to communicate with the passage 38 in the service portion of avalve device, and with the passage 298 in the bracket member. Thispassage communicates With ports on opposite faces of the filling piece,

these ports being identified, in Figs. 4 and 5 of the drawings, by thesame reference numeral as is employed for the passage.

The filling piece 415 has a passage 486 extending therethrough andadapted to communicate with the passage 48 in the service portion of avalve device, and with the passage 291 in the bracket member 259. Theports Von the face of the filling piece which are joined by this passageare identified, in Figs. 4 and 5 of the drawings, by the referencenumeral employed for the passage. Y

The passage '481 extends through the lling piece 415 and communicateswith the passage 34 in the service portion of the valve device, and

with the passage 295 in the bracketV member. The passage 451 has abranch passage 489 associated therewith and communicating with thecentral opening 59|! in the lling piece through which extends the pistonstop stem 289, and which is in communication with the piston chamber l5.

The passage 489 extends through the'filling piece and communicates withthe passage 14 in Vthe valve portion and with the passage 295 in thebracket member 259. The passage 499 in the lling piececommunicateswith-the passage 59 in the valve device. and with thepassage 299 in the bracket member, while the passage 49| in the fillingpiece communicates with the passage 83 in the service portion of a valvedevice and with the passage 293 in the bracket member. The passage 492in the filling piece communicates with the passage 51 in the valvedevice to be tested, and with the passage 292 in the bracket member.while the passage 493 in the filling piece communicates with the passage29 in the valve device and with the passage 29| in the bracket member.

As will be seen in Fig. 2 of the drawings, kthe filling piece 516comprises a substantially flat body portion generally similar to that ofthe filling piece 415, and having a plurality of passages extendingtherethrough and adapted to communicate with ports in opposite faces ofthe body of the lling piece.

The filling piece 415 has a plurality of threaded openings 5|0 formedtherein, (see Figs. 8 .and 9), which are adapted to have secured thereinbolts, shown in section, which extend through the holes 39| in thebracket member 250 in ord-er that the lling piece 416 may be securedV inplace against'the bracket member.

InA addition the mung piece 41s has a piumiayof threaded openings 5I2formed therein: and adapted Yto receive bolts, shownrin section, whichextend through the bolt holes V295m the emergency valve portion inforder to hold the valve portion in position against the iace of thefilling piece. Suitable gaskets 5| 4 and 5 I 5 are interposed betweenthe valve portion and the face of the filling pieceand between the llingpiece and the face ofthe bracket member to prevent the escape of fluidunder pressure at thesepoints. Y

The filling piece 416 has a passage Y5I5 extending therethrough andadapted to communicate with the 'passage |4| in the emergency portion.of the valve device and with the passage. 295 in the bracket member259, the ports in `the faces of the lling piece with which this passagecom municates being identied in Figs. 8 and 9' of the drawings bythesame reference character asis employed for the passage. A branch passage5|1 communicates with the passage 5|5 and with the central opening 525in the filling piece through which extends the piston stop stem 289e,and which is in constant communication with the piston chamber l in thevalve device.

The filling piece 416 has a passage 5|8 extending therethrough andcommunicating with the passage |95 in the valve device and withV the Y,

passage 291 in the bracket member.

A passage 5|9 is `formed in the filling piece and is adapted tocommunicate with the passage |52 in the emergency portion of the valvedevice and y I with the passagev 295 in the bracket member. A passage52|! is formed in the lling piece and o communicates with the passage|99 in the valve device and with lthe passage 293 in the bracket member,while the passage 52| in the iillingpiece communicates with the chamber|99 in the emergency portionV of the valve device and with Vthe passageY292 in the `bracket member 259. A branch passage 522 communicates withthe passage 52| in the filling piece and with Ythe passage 222 in theemergency portion of the valve device.

, As is best shown in Fig. 2 of the drawingswhen the emergencyllingpiece 416"is,.in position* against the face ofthe bracket member255, communication through the passages 29|, 294 and 298 is cut oif. A

The filling pieceV 4.16' also has an arm 539 formed integral therewith,and extending to a point o-pposite the atmospheric exhaust passage |28in the emergency portion of a. valve device,V

when this portion is in position against thev face of the filling piece.

The arm 539 has a chamber 532 formed therein, one wall of this chamberbeing formed by the diaphragm 533. A plunger 535 is positioned adjacentthe diaphragm so as-to be engaged-thereby, and has a stem 539 positionedin a bore 55S therein, the stem having arrounded end portion llllwhichis adapted to engage a concave recess 54| in the sealing device 544which is adapted to close theV atmospheric exhaust passage |23 in theemergency portion Yof the valve device.

The sealing device 5d4comprises a body 545 having an annular sealingmember 541 secured on one face thereof by means of the member 548 fwhich is screwed into a threaded opening inthe passage 550 extendingtherethrough and has a pipe 55| screwed into a threaded opening in theend of the passage 555, and this pipe has a valve or cock 552 secured onthe opposite end thereof and controlling communication through thepassage in the sealing device. The passage leading from the valve 552 isproportioned so as to receive the nozzle of the leakage indicator shownin Fig. 13 of the drawings.

A passage 555 is formed in the lling piece 416 and communicates with thechamber 532 and with the passage 5|9. Y

I n operation, the sealing device 544 is placed over the opening |28 andfluid under pressure is then supplied to the chamber 532 which operateson the diaphragm 533 so as to move the plunger 535 and cause the stem538 to press against the body of the sealing device so that the sealingmember 541 is pressed firmly against the body of the emergency valveportion surrounding the opening |28 and effectively seals this opening.

In Fig. 13, I have illustrated a leakage indicator adapted to beemployed in connection with the test apparatus provided by thisinvention, and, as illustrated, this leakage indicator comprises a body510 having a chamber 51| formed therein adapted to contain a quantity ofliquid, such as water. The leakage indicator also includes a conduit 513constructed of substantially transparent material such as glass. Thisconduit is mounted so as to extend in a substantially vertical plane andmay be held in place and be pro- Y tected by a housing member 515 havingan opening or window 516 therein. The upper end of the conduit 513 isopen to the atmosphere through the vport 518 and the lower end of theconduit is in communication with the chamber 51| by way of the passageformed in the body 510. The conduit 513 may have a plurality of marksthereon indicated at 518 by means of which the level of the liquid inthe conduit may be determined.

The chamber 51| has a passage 580 communieating therewith and with aflexible tubing 58|, which may be constructed of any suitable material,such as rubber, and which has a nozzle or handle piece 582 secured onthe other end thereof. The nozzle 582 is adapted to be held by the handof the operator and has an end portion provided with a substantiallyconical portion 584 which is adapted to extend into and engage the wallsurrounding the passage in the terminal pieces employed in connectionwith certain of these valves in the test apparatus provided by thisinvention.

In operation the nozzle of the leakage indicator is placed in theopening in the terminal member and is held rmly against the walls ofthis opening so that the conical member engages this wall to preventleakage around the nozzle piece, and any fluid which ows through thepassage of the terminal piece is carried by means of the conduit 58| tothe passage 580 and therefrom to the chamber 51|. As the pressure in thechamber 51| builds up, the liquid in this chamber is forced from thechamber through the passage leading to the conduit 513 to cause thelevel of the liquid in this conduit to rise. The amount of` leakagethrough the terminal member, and accordingly, the leakage into thepassage with which the terminal member is associated, may be determinedby observing the extent of the rise of the liquid in the conduit 513.

In the preferred arrangement of the testing apparatus provided by thisinvention the entire apparatus is mounted upon a Work bench or rack Inthe preferred embodiment, the piping conl necting the valves and gageswith each other and with the reservoirs and with the bracket member 25Bis mounted behind the panel on which the gages and valves'are mounted soas to provide a test stand which is attractive in appearance, while thereservoirs employed in the system may be placed beneath the shelf onwhich the bracket is mounted so that the entire testing apparatus formsa compact unit.

The test stand also preferably has associated therewith a container forsoap solution which is employed in certain of the tests to ascertainwhether there is leakage in various parts of the valve portion beingtested. 'I'he test stand also has mounted thereon, in a convenientlocation, a leakage indicator, one type of which is shown in detail inFig. 13 of the drawings, the flexible hose 58| which is associated withthe leakage indicator being long enough to reach the terminal membersemployed with certain of the valves in the test apparatus, the terminalmembers being mounted on the panel at the back of the shelf of the testrack.

The equipment provided with the test rack also includes a timing devicesuch as a clock to indicate elapsed time, preferably in seconds, bymeans of which the time required for various tests may be quickly andaccurately determined.

While any form of valve or cock may be employed in the test apparatus, Iprefer to employ a valve of the type which can be moved from the closedto the full open position by` a relatively short movement of theoperating handle associated with the valve, and which, when in theclosed position, will effectively cut off communil standard ofworkmanship and general condition,

and these tests will now be described in detail. The tests employed inconnection with the service portion will be described rst and will befollowed by a description of the tests employed in connection with theemergency portion.

In order to test the service portion of the valve device, the serviceportion lling piece is secured in place against the face 25| of thebracket member 250, the gasket 48| being interposed between thesemembers to prevent leakage. The piston stop stem 28B of the properlength is secured in the piston I6 of the valve device, and the valvedevice is then secured against the face of the filling piece, the gasket485 being interposed between the body of the valve device and illingpiece. When the valve device is in position the piston stop stem.projects through the opening 580 in the filling piece and the opening255 in the bracket memb-er, and into the chamber formed by the cover260. The test apparatus and the valve device are now substantially inthe relationship shown diagrammatically in Fig. 1 of the drawings.

'I'he testing of the service portion of the valve device is begun withall cocks or valves of the testing apparatus except the cocks 445 and441 closed and with the handle 338 .of the operating valve 335 in No. 8position, in which position the ilow of fluid under pressure from themain reservoir 325 through the pipe 340 to the brake pipe reservoir 329is cut oir", and the brake pipe reserv voir is connected to theatmosphere through a port formed by a gli" drill.

The handle 333 is now moved to the No. 1 position, in which air from themain reservoir 325 is supplied to the pipe 34I and therefrom to thebrake pip-e reservoir 329 through a 1/4" port. In addition the cocks39B, 443, 39S, 4i i, 469 and 382 are opened so that air from the mainreservoir 325 flows through the valve 335 to the brake pipe reservoir329, and therefrom by way of the pipe 380, the open valve 382 and thepipes 352 and 443 to the passage 29| in the bracket member 250, andtherefrom through the passage 493 in the filling piece 415 to thepassage 20 in the valve portion to the valve chamber I'I. Fluid alsoHows from the pipe 445 through the open valve 443 and the pipe 442 tothe auxiliary reservoir 320. Fluid also flows from the reservoir S29 byway of the pipes 31B and 380, the open valve 353 and the pipe 388 to thepassage 29S in the bracket member and the passages 481 and 488 in thefilling piece which communicate with the piston chamber I5.

In addition, iiuid under pressure ows from the pipe 343 through the openvalve 490 to the pipe 408 and therethrough to the emergency reservoir 32I. When the auxiliary and emergency reservoirs are charged to the full80 pound pressure, the valves 493 and 382 are closed. The

i pressure of the fluid in the auxiliary and emergency reservoirs may bedetermined by means of the gages 405 and 386.

The piston I5 and the slide valve 2l of the valve to be tested arenowmoved between the release and service positions several times by movingthe operating handle 338 of the operating valvel 335 between thepositions No. l and No. 8 severalv times. This produces a variation inthe pressure of the fluid in the chamber i5 which effects movement ofthe piston i6. The operating handle 338 is left in the No. 8 position,in which position the brake pipe reservoir 32S is connected to theatmosphere through a 5% port. This permits fluid to flow from the pistonchamber I5 to the atmosphere, and causes the piston l5 and the slidevalve ,2i of the valve device to be moved by the fluid in the valvechamber I'I to the extreme right, as viewed in Fig. l of the drawings,which is the service position. The piston and slide valve are thensubstantially in the position shown in Fig. 14 of the drawings.

At this time the valve 4I6 is opened which permits communication betweenth-e passage 83 in the valve device and the brake cylinder reservoir 322by way of the passage 49! in the filling piece 415, the passage 293inthe bracket member 250, and the pipes 4 I4 and 429. When the piston I3is moved to the service position as shown in Fig. 14 of the drawings,the passage 83 of the valve device 'is in communication with the valvechamber II by way of a passage o-r port formed in the slide valve 2I sothat the brake cylinder reservoir 322 is charged with iiuid underpressure supplied from the valve chamber il.

While the slide valve 2I is in this position, the nozzle ci the leakageindicator 5l!! is inserted in the opening in the terminal piece 4I2associated with the valve 4I I which communicates with the passage 59 inthe valve portion, which when the slide valve is in the serviceposition, as shown in Fig. 14 of the drawings, is in communication withthe cavity 49 in the slide valve 2I. The cavity 49 also communicateswiththe passage 48 leading from the release insuring valve device employedin this valve portion.

If/ there is any lleakage of fluid through the release insuring valvedevice or past the slidev valve 2I, the fluid will flow throughthe pipe4I0 and the valve 4II and will cause the water in the column 513 of theleakage indicator to rise. The amount of leakage into this passage maybe determined by the rate of the rise ofthe water column in the leakageindicator, and in this manner it may be determined whether this `portionof the valve is up to the proper standard of workmanship and generalcondition.

Leakage from the quick service exhaust port 35 may be detected bycovering the-exhaust port 85'with soapsuds. If there is leakage throughthe quick service volume 86 when the slide valve is in the serviceposition, a bubble will be formed around the exhaust port, and thecondition of the seat of the slide valve may be determined by observingthe time required to form a bubble of predetermined dimensions.

The condition of the slide valve in the region 'of the passage 'I4 isnow tested. This is accomplished by closingvalve 399 .and opening valve40|, and placing the nozzle of the leakage indicator 510 in the openingin the terminal member '403 associated with the valve 40|. Leakage offluid through the passage 'I4 will cause the water in the column 513 ofthe leakageindicator to rise, and the rate of this rise will indicatethe relative condition of this portion of the slide valve seat.

rIfhe condition of the diaphragm 52 of the limiting valve device is nowtested, this being accomplished by coating the exhaust port leading fromthe passage 55 with soapsuds. If there is any leakage through thediaphragm 52 of the chamber 56 a bubble will form.

For the next test the valves 443, 4I6 and 399 are closed, thus cuttingoff the auxiliary reservoir 320, the brake cylinder reservoir 3,22, andthe emergency reservoir 32| from the valve portion being tested. Thepressure registered on the gage 425 is now noted. This pressure is thesame as the pressure in the valve chamber I'I, as the pipe 4I4 is incommunication with the chamber I'I by way of the passage 293 in thebracket member 255, the passage 49I inthe filling piece 415, the passage83 in the valve device, and the. port through the slide valve 2|. Therate of decrease registered on this gage is observed, this indicatingthe escape of fluid from theY valve chamber I'I. Fluid may escape fromthe valve chamber y. II because of a leak in thediaphragm 4l of thefluid under pressure released throughfthe valve 424 from the brakecylinder reservoir 322 until the pressure registered on the gage 425drops to a predetermined low value at which time the` valve 424 and 429are closed.

When the valve 429 is open the Abrake cylinder Y :.75

reservoir is in communication withV the chamber 53 associated with thelimiting valve employed in the brake valve device by way of pipes 420,428, passages 292 and 492, and passage 51 in the body of the valveportion. 'When the pressure of the fluid in the brake cylinder reservoir322 is reduced, the pressure of the iluid in the chamber 56 is similarlyreduced, and this pressure is of such a value that it is insujcient tomove the diaphragm 52 against the spring 53 with the result that thevalve 58 is moved away from the seat rib which it is adapted to engage,and fluid is permitted to ow from the chamber 56 to the chamber 58.

After the valve 429 is closed, the pressure registered on the gage 43E)is observed for a time interval.l and leakage, which will result in areduction in' the pressure registered on this gage, will be due toleakage past the ball check valve element 151 to the passage B2, andtherefrom to the cavity 63 in the slide valve 21 and to the passage 33which communicates with the passage 38, whichinturn is in communicationby way of the passages 485 and 298 with the pipe 318 and the brake pipereservoir 328. The brake pipe reservoir is at this time in communicationwith the atmosphere through the operating valve 335.

After the preceding test has been completed the valve 411 is closed,while the valves 443, 416, 39S, 4811, 4211, 418 and 311 are opened.`When the auxiliary reservoir 329 has been charged to the iull pressureof 80 pounds permitted by the feed valve device 325, the operatinghandle 338 of the operating valve 335 is moved to the No. 3 or lapposition, and valve 382 is opened. The entire service portion should nowbe covered with soapsuds to detect gasket leakage or undesired leakageat any other point in the valve portion.

Y After the completion of this test the operating hand-le 388 of theoperating valve 335 is moved to position No. 1 in which uid underpressure from the pipe 348, which communicates with the main reservoir325, is permitted to flow to the brake pipe reservoir 323. The cocks orvalves 438, 418 and 382 are now closed while the valve 318 is opened,and the pressure of the iluid in the auxiliary reservoir 328 is reducedto a predetermined low value at which time the valves 318 and 311 areclosed. The valve 424 is now opened and the pressure of the fluid in thebrake cylinder reser- Voir 322 is reduced to atmospheric pressurefollowing which the valve 424 is closed. |Ihe valve 411 is now opened.

The operating handle 338 of the valve 335 is now moved to position No. 5in which fluid under pressure from the brake pipe reservoir 329 ispermitted to escape to the atmosphere through a port formed by a No. l5drill. When the pressure of the fluid in the brake pipe reservoir 329 isreducedk to a relatively low value, as indicated by the gage 311, thevalve 416 is closed and the handle 338 of the operating valve 335 ismoved to the No. 1 position.

As a result of this operation of the operating valve 335 the piston 15and slide valve 21 of the valve service portion is moved to the chargingposition, and is substantially in the position in which it isillustrated in Fig. 1 of the drawings.

The hose nozzle of the leakage indicating device shown in Figv 13 is nowinserted in the opening in the terminal piece 412 associated with thevalve 41 1 which is now moved into the open position, and the level ofthe liquid in the column 513 of the leakage indicator is observed todetermine Vwhether or not there is leakage through the slide valve seatwith the slide valve'in the position in which it is shown in' Fig. 1` ofthe drawings.

The exhaust port 85 is now covered with soapsuds to detect slide valveor graduating valve leakage.

The valve 424 is now opened and the pressure of the fluid in the brakecylinder reservoir 322 is reduced to a relatively low value, such as 5pounds, as indicated on the gage 430. 'Ihe valves 429 and 424 are thenclosed and the gage 430 is observed for a time interval. An increase inthe pressure registered by this gage will be due to slide valve leakage.

After the completion of the preceding test the valve 1111` is opened andthe handle 338 of the operating valve 335 is moved to position No. 5 tovent uid from the brake pipe reservoir 329, and when this pressure hasbeen reduced to a predetermined relatively high value, such as 68pounds, as indicated by the gage 311, the handle 338 is moved to the No.3 or lap position.

The valve 421 is now opened and the iiuid in the brake cylinderreservoir 322 is permitted to escape until the pressure of fluid in thisreservoir is reduced to a value substantially one-half that in the brakepipe reservoir, such as 30 pounds, at which time the valves 416 and 421are closed.

The pressure indicated by the gage 425 is observed for a time intervaland the decrease in the pressure registered by this gage indicatesgraduating valve leakage, and in some instances slide valve leakage.

The hose nozzle of the leakage indicator is now inserted in the openingin the terminal member 412 associated with the valve 411 to detectslid-e Valve and release insuring valve leakage.l

iter the completion of the preceding test the exhaust port 85 leadingfrom the quick service chamber 86 is coated with soapsuds to detectslide valve or graduating valve leakage.

The valve 416 is now opened and the handle 338 of the operating valve335 is moved to a No. 5 position, and the brake pipe pressure reduced tosubstantially pounds at which time the handle 338 is moved to No. 3 orlap position.

The piston 13 and slide valve 21 of the valve portion being tested arenow in the lap position which is a position intermediate the position inwhich the piston and slide valve are shown in Figs. 1 and 14 of thedrawings.

The gage 311 is now observed for a time interval for an increase inpressure in the reservoir 329, and such an increase may occur as aresult of leakage past the ring on the piston 16, leakage past theback-flow check valve 61, or it may be due to slide valve leakage.

At the completion of this test the handle 338 of the operating valve 335is moved to position No. 8 so as to release the fluid in the pistonchamber 15 to the atmosphere. The cover 260 is now removed from theright hand side of the bracket member 250 as viewed in Fig. 1 of thedrawings, and the horseshoe or locking member 281 is placed in theannular recess 282 adjacent the end of the piston stop stem 28D. Thiscan be done readily as the piston 13 will be moved to the vextreme rightposition as viewed in Fig. 1, due to the reduction in the pressure onthe right hand side of the piston, and the pressure of the fluid in thevalve chamber 11 operating on the left hand side of the piston.

The cover 260 is now replaced and the handle 338 of the operating valve335 is moved to the No. 1 position to supply uid under pressure to thebrake pipe reservoir 329. The apparatus is now in condition to testthe'packing or piston ring employed on the piston I8 for leakage.

In order to test the packing ring on the piston I6 for leakage, thevalves 39D, 443, 4|6, 399, 4H and 382 are opened, the other numberedcooks in the test apparatus being closed, and the operating handle 338of the valve 335 is moved to the No. 1 position if it is not already inthis position.

When the handle 338 of the operating valve 335 is moved to the No. 1position, fluid under pressure is supplied to the piston chamber l5 andon an increase in the pressure of the fluid in this chamber, the piston|5 is moved to the left until the horseshoe or locking member 281mounted on the piston'stop stem 283 engages the face of the bracketmember 250 opposite the face 251.

The piston stop stem 280 is of such a length that the horseshoe orlocking member 281 will engage the bracket member to prevent furthermovement of the piston when the piston is in a position adjacent theservice position, which is the position in which the piston is shown inFig. 14 of the drawings. When the piston IB is in this positioncommunication between the piston chamber |5 and the valve chamber I1through the feed grooves 88 and 8| is cut off.

The operating handle 338 is now moved to the No. 3 or lap position andthe valves 318 and 311 are opened to reduce auxiliary reservoir andbrake pipe pressure to a predetermined relatively high pressure, such as60 pounds, whereupon the valves 318 and 311 are closed. Thereaftervalves 4H and 382 are closed, and valve 424 is opened to drain the brakecylinder reservoir 322. The valve |24 is then closed.

The valve 334 is now opened, thereby opening a communication from thevalve chamber I1 to the atmosphere by way of the passage 23 in the valveportion, the passage 433 in the iilling piece 415, the passage 23| inthe bracket member 255, the pipe 440 and the open valve 384. The gage33|, which is in constant communication with the piston chamber |5 byway of the passages 488 and 481 in the filling piece 415, the passage236 in the bracket member 258, and the pipe 383, is now observed, andthe amount of leakage past the packing ring employed on the piston l5may be determined by noting the rate of drop in the pressure registered.on the gage 39|. At the completion of this test the valve 384 is closedand the valve 4H is open.

The release insuring valve device employed in this valve section is nowtested, and to make this test the valves 355, 443, M3, 339 and 4H areopened, and the other numbered cocks or valves are closed, While theoperating handle 338 of the operating valve 335 is in the No. 3 or lapposition. The handle 338 is now moved to the No. 1 position, after whichthe valve 382 is opened so as to charge the brake pipe reservoir 323 andthe auxiliary reservoir 320 to a pressure'of 80 pounds. When thepressures in the reservoirs 329 and 328 have equalized, the handle 338is moved to the No. 3 or lap position, while the handle 339 of theoperating valve device 336 is moved to the cut-in position.

manometer 358 should now be at the Zero position. l

The valve 455 should now be opened to `release fluid under pressure fromthe auxiliary reservoir, and also from the valve chamber l1 which is incommunication with the auxiliary reser- The valve 332V is now closed.The level of the water in theV voir by way of the Vpassage 20 in thebody of the valve device, passage 493 in the iilling piece 415, thepassage 29| in the bracket member 25B, and the pipes 44D and 4-42.r Thereduction in the pressure of the fluid in the valve chamber I1 resultsin a pressure difference in the chambers 31 and 43 on opposite sides ofthe diaphragm 4|, and causes thisA diaphragm tov be moved to the left,as viewed in Fig. 1, to move the valve 45 away from its seat so thatduid is vented by way of the passage 48. Fluid which is discharged intothe'passage 48 flows to the atmosphere through the passage 5G, the pipe4|0, and the opened valve 4| A When the pressure of the fluid in theauxiliary reservoir 328 is reduced throughthe valve 453 the pressure inthe top tank 352 of the manometer 358 is also reduced, as this has beenplaced in communication with the auxiliary reservoir on movement of thehandle 3390i the valve device 333 to the cut-in position.

communication with the brake pipe 310 and the Vpressure of the fluid inthe brakeV pipe remains substantially constant during this test. By`observing the level of the w'ater inA the manometer 358 at the timeatlwhich fluid is Vented from the valve 4| which may be determined byobserving the passage'leading from the valve 41|, or by a sudden rapidmovement of the water in the manometer, the difference in the pressuresin the brake pipe and in the auxiliary reservoir which is required tooperate the release insuring valve device may be determined.

As soon as the release insuring valve device opens, fluid is vented fromthe valve chamber |1, Which is in communication with the auxiliary Yreservoir, and also in the top tank 362, thereby further reducing thepressure in these chambers. Due to the reduction in the pressure in thechamber in the top tank 382 the-pressure of the fluid operating on theliquid in theY bottom tank 36| tendsto `force al1 of the liquid in thistank into the upper tank, and to prevent this occurrence, the valve 45|should be opened as soon as the release insuring valve device opens,While thel valve 458 should be:closed.

When the valve 45| is opened fluid under pressure is supplied from themain reservoir 325 to the auxiliary reservoir` and to the valve chambervEl, and therefrom to the chamber 43 on the left hand side of thediaphragm 4| The passage through the valve 45| is proportioned so as tobe somewhat larger than the passage through the choke 48a. through whichthe release insuring valve discharges fluid fromY the valve chamber 1.The pressure of the fluid in the valve chamber I1 is therefore increasedand there will be a corresponding increase in the pressure of the fluidin the chamber` 43, and as a tion and fluid will no longer be releasedfrom the valve chamber I1. Y

With the valve 45| open the water in the manometer will tend to returnto the bottom tank due to the increase in the Vpressure of the fluid inthe valve chamber |1, and also in the top tank 362V, which is connectedto the valve chamber, and the release insuring valve should close V andcut off the flow of v.fluid ktothe valve 4H l At the sameY time thebottom tank 36| of the manometer is in '60 result, the valve 45 willmove to the closed` posi- .70 V before the water in themanometer reachesthe i initial position. kIf the water inthe manometer fallsA below `theinitial position before the release insuring valve device closes YYit isan indicationY ,k

`of. excess frictionjin the release .insuring valve.

Chfy

Cil

After the completion of this test, the handle 339 of the valve 336 ismoved to the cut-out position, While the valve 45| should be closed.

The valve 384 is now opened so as to release fluid from the auxiliaryreservoir 320 to the atmosphere, and as soon as the release insuringvalve device opens the valve 384 is closed. As soon as the releaseinsuring valve is opened fluid will be released from the valve chamberI1 and also from the auxiliary reservoir 320 through the passage 48, therate of ow through this passage being regulated or limited by the choke48a, the capacity of this choke being determined by observing the rateof reduction in the auxiliary reservoir pressure which is indicated bythe gage 386.

At the completion of this test the handle 338 of the valve device 335 ismoved to the No. 8 position so as to release the fluid in the pistoncharnber I5. The cover 260 is now removed and the horseshoe or lockingmember 281 is removed from the piston stop stem 280, whereupon the cover230 is replaced.

After the completion of the preceding test the valves 390, 443, 4|6, 399and 4H are opened and the other valves are closed, while the operatinghandle 338 of the operating valve 335 is moved to the No. 1 position tosupply uid under pressure to the brake pipe reservoir 329. The valves400 and 382 are now opened, and after the brake pipe reservoir 329 andthe auxiliary reservoir 320 are charged to 80 pounds, the valve 382 isclosed and the handle 338 is moved to the No. 4 position in which fluidunder pressure is released from the brake pipe reservoir 329. Onmovement of the handle 338 to the No. 4 position, the service piston andgraduating Valve of the valve device under test must move to the serviceposition and uid must be released from the port 85 leading from thequick service cavity 86.

The discharge of fluid from the quick service port should last not lessthan a predetermined time interval, such as three seconds, and byobserving the length of time during which fluid is exhausted from thisport, the condition of this portion of the valve may be determined.

At the completion of the test the handle 338 is moved to the No. 1position, in which fluid under pressure is supplied to the brake pipereservoir 329, and the valve 382 is opened.

The next test is designed to determine-the condition of the duplexrelease valve and is started with the valves 390, 443, 4|6, 399,'4Il,400 and 382 open, and with the handle 338 of the valve 335 in the No. 1position. The valves 443, 400 and 382 are now closed. The handle 19 isnow moved the full extent of its travel, and causes the valve element 1|to be unseated so as to permit the release of fluid under pressure fromthe emergency reservoir 32| by way of the pipe 408, the open valve 399,the pipe 398, and the passages in the bracket member 250 and the llingpiece 415. The reduction in the pressure of the uid in the emergencyreservoir 32| may be observed on the gage 405, and by observing the timerequired to eiect a predetermined reduction in the pressure of the fluidin the emergency reservoir, the capacity of the emergency portion of theduplex release valve may be determined. n

During the testing of the emergency portion of the duplex release valvefluid under pressure is retained in the auxiliary reservoir 320 becausethe valve 443 remains closed. At the completion of the test of theemergency section of the duplex release valve the valve, 399 is closedand the valve 443 is opened. The handle 19 of the' duplex release valveis again moved the full extent of its travel, and the valve 65 beingunseated, uid is permitted to escape from the auxiliary reservoir 320 byway of the pipe 442, the open valve 4343, and the pipe 440, togetherwith the passages in the bracket member 250 and the filling piece 475.

The pressure of the fluid in the auxiliary reservoir 320 may be observedby means of the gage 386, and the capacity of the auxiliary section ofthe duplex release valve may be determined by observing the length oftime required to effect a predetermined reduction in the pressure of thefluid in the auxiliary reservoir.

At the completion of this test the handle 338 of the valve 335 is movedto position No. 8 in which fluid under pressure is released from thebrake pipe reservoir 329, and the valves 42|, 399, 40| and 382 areopened. After the auxiliary, emergency and brake cylinder reservoirs aredrained these valves are closed.

The next test is designed to determine the rate of charging of theauxiliary reservoir when the service piston is in the retarded chargingposition and is begun with the valves 399, 443, 4|6 and 4|| open, theother numbered valves being closed, and the handle 338 of the valve 335in position No. 8. The handle 333 is now moved to position No. l whicheffects a supply of fluid under pressure to the piston chamber l5 andcauses the piston I6 to move to the extreme left hand position, asviewed in Fig. 1 of the drawings, in which position the feed groove 8|is closed and communication is established between the piston chamber I5and the valve chamber by way of the feed groove 80 only. Fluid underpressure will be supplied to the auxiliary reservoir 320 from the valvelchamber |'l, and the pressure of the fluid in the auxiliary reservoirmay be determined from the gage 33S. By observing the time required toeiTect a predetermined increase in the pressure of the iluid in theauxiliary reservoir, the operator can determine whether or not thisportion of the valve under test is in the proper condition for service.

On completion of the preceding test the valve 382 is opened, and whenthe auxiliary reservoir 320 has been charged to '70 pounds pressure,this Valve is closed, whereupon the valves 399 and 45| are opened. Fluidunder pressure is now supplied from the valve chamber Il' to theemergency reservoir 32| by way of a restricted port in the slide valve2|, the passage 14 in the vvalve device, passage 439 in the iillingpiece 475,

passage 295 in the bracket member 250, and the pipes 398 and 408.

The pressure of the fluid in the emergency reservoir may be determinedfrom the gage 405, and by observing the length of time required toeffect a predetermined increase in the pressure of the fluid in theemergency reservoir the condition of the valve may be determined.

At the completion of this test the valves 490, 424 and 382 are opened.

The next test is designed to test the application and release by-passcheck valves. It is undertaken with the valves 390, 0.33, M5, 399 and4|| open, the other numbered valves being closed, andthe handle 338 ofthe valve 335 in the No. 1 position.

To test the release by-pass check valve 30, Valve 390 is closed and thehandle 338 of the valve 335 is moved to the No. 5 position, and thepressure in the reservoir 329 is reduced to a predetermined pressure,such as 65 pounds, at which aioasozsA time the handle 338 is moved tothe No. 3 or lap position. .f

The pressure in the brake pipe reservoir 329 is indicated by the gage31| and the pressure in the pipe 388 is indicated by the gage 39|. Y

The pipe 388 is in communication with the piston chamber l5 and thevalve chamber |1 by Way of the passage 481 in the iilling piece 415,arid a branch passage 488, and is in communication With the chamber 33byWay of the passage 34 in the valve being tested. On a release of uidunder pressure from the reservoir 329, fluid is released from thechamber 31 by Way of the passage38 and the pipe 318, and, on a re-`duction in the pressure in the chamber 31 below a predetermined amountbelow the pressure of the fluid in the chamber 33, the valve 38 Will beunseated so that fluid Will flow from the chamber 33 into the chamber31. The pressure differential between the chambers 33 and 31 Which isrequired to unseat the valve 38 may be determined by observing thepressures registered by the gages 31| and 39|. In this manner it can bedetermined Whether the release by-pass check valve 3|! is operatingproperly.

Upon the completion of the preceding test the handle 338 of the valve335 is moved to the No. 1 position so that fluid under pressure issupplied from the main reservoir by Way of the pipe 349 to the pipe 34|leading to the brake pipe reservoir 329, and therefrom to the pipe 31|)to the passage 38 in the valve device being tested. On an increase inthe pressure of the fluid in the chamber 36, the application by-passcheck valve 3| will be unseated and fluid will flow from the passage 38to the chamber 33, and therefrom by Way of the passage 34 in the valvedevice and the passages 481 and 488 in the filling piece 415 to thepiston chamber |5, and then to the valve chamber I1 and to the auxiliaryreservoir 320.

The pressure differential in the chambers 38 and 33 which is required tounseat the application by-pass check valve 3| may be determined byobserving the pressures registered `on the gages 31| and 39|, and inthis manner it can be determined Whether or not the application by-passcheck valve is functioning properly.

At the completion of this test the valves 398, 489 and 382 are opened,and when the auxiliary reservoir 329 is charged to S0 pounds pressure,the valves 483 and 382 ane closed.

The next test is designed to check the rate of flow of uid underpressure to and from the brake cylinder and is begun with the valves398, 443, 4|6, 399 vand 4|| open, the other valves being closed, andthehandle 338 of the valve 335 in the No. 1 position.

The handle 338 is novg moved to the No. 6 position and the pressure ofthe fluid in the reservoir 329 reduced-to a predetermined pressure, suchas 55 pounds, whereupon the handle 338 is moved to the No. 3 or lapposition.

When the handle 338 of the valve 335 is moved to the No. 6 position, uidis released from the piston chamber i5 and the piston moves to theapplication position, in which position fluid flows from the auxiliaryreservoir to the valve chamber |1, and therefrom through a port orpassage in the slide valve 2| to the passage 83 in the valve device, andtherefrom to the brake cylinder reservoir 322.

The pressure of the fluid in the reservoir 322 is indicated by the gage425, and by observing the time required to produce a predeterminedincrease in the pressure of the fluid in the reservoir 322 the rate offlow'of fluid to this reservoir may be determined.

The handle 338 is noW moved to the No. 2 po"` sition so that fluid underpressurer is supplied to' the piston chamber I5, thereby causingthepiston I6 to be moved to the release and charg-r ing position, which isthe position in which itis shown in Fig, l of the dravvings. When thepis Y ton i3 and slide valve 2| are in this position thev passage 83,Whichcommunicates with the brakel cylinder reservoir 322, is incommunication with the passage 53 through the cavity 49 in the slidereservoir 322 Will be shown on the gageV 425, and .i

by observing'the time'required to produce a'predetermined reduction inthe pressure of the fluid in the brake cylinder reservoir 322, thecondition of the release port associated with the brake cyl-V inder maybe determined. This tests the portion of the port employed when thepiston is in the full release and charging position. y s Y.

The handle 338 is now moved to the No. 1 position, thereby increasingthe r-ate of ovv of fluid under pressur-efto the brake pipe reservoir329 and therefrom to the piston chamber |5,`andV causing the piston |76to be moved to the retarded recharge position. e Y

The brake cylinder reservoir 322 continues to discharge through thevalve device and the rate of reduction can be determined by observingthe gage 425. In this manner the operator can determine Whether or Ynotthe passage. through Which the brake cylinder exhausts when the pistonand slide` valve are in` the-retarded recharge position is of the propercapacity. Y

On the completion of this test the valves 4180 and 382 are opened, andwhen the auxiliary and emergency reservoirs are Acharged to the fullpressure of 80 pounds these valves are closed.

They next test is designed to test the quick serv# ice limitingvalvewhich controls communication is undertaken with the valves 39|), 443.415,. 399 and 4|| open, the other numbered valves being closed, and thevalve handle 338 in the No. 1 position in which fluid under pressure issupplied to the brake pipe reservoir 329.

is now closed and the Valves 429 and 424 are opened. As soon asthe brakecylinder 322 is reduced to atmospheric pressure the valve 424 is closed.Y

The handle 338 of the valve 335 is now-moved to Y the No. 4 position torelease iiuid from the brake moves to the service position, which willbeindicated bythe rapid rise in the hand on the gage 425. The handle v338should then bemoved to the No. 3 or lap" position.

When the piston I6 moves to the service position (see Fig. 14) thepassage 62', v/"nichmim-v municates with the chamber 68, is connected bypipe reservoir 329 and from the chamber |5 at the faceof the pistonV I6Yuntil the service piston V|| Way of the cavity 63 in the slide valve 2|'with the. Y

passage 39, which communicates with the passage 38 .so that `fluid underpressure flows fromV theV brake pipe passage 38 to the Ychamberliii Vand45 between the brake pipe and the brake cylinder and Y therefrom aroundthe valve element 58, and l open valve 429 to the brake cylinderreservoir 322. The pressure of the fluid in the brake cylinder reservoir322 is indicated by the gage 425, and the operator by observing the timerequired to effect a predetermined increase in the pressure in the brakecylinder reservoir 322, can determine Whether the restricted passage 62ain the passage 62 leading to the chamber 60 is of the proper capacity.

The only connection with the brake cylinder reservoir 322 at this timeis by way of the passage 51 in the valve device, and, on an increase inthe pressure of the iluid in the chamber 56 the diaphragm 52 will beflexed upwardly so as to move the valve 58 into engagement with the seatrib 59 in the body of the valve device and thereby cut off the flow ofiluid from the chamber 60 to the chamber 56. The pressure of the fluidin the chamber 56 is the same as the pressure of the uid in the brakecylinder reservoir 322 and this is indicated by the gage 430. Theoperator can determine the pressure required to close the quick servicelimiting valve by observing the gage 438, and in this manner candetermine whether this portion of the valve device is in proper workingorder.

The valve 429 should now be closed so as to cut off communicationbetween the pipe 428 and the brake cylinder reservoir 322, leaving thechamber 56 in communication with the pipe 428 which is of limitedvolume. The gage 439 should now be observed for a rise in pressure. Therise in pressure will be due to leakage of fluid under pressure from thechamber 60 to the chamber 56 around the valve element 58, and in aproperly working valve there should be no leakage at this point.

The valve 429 should now be opened and the valve 424 should be opened soas to reduce pressure in the brake cylinder reservoir 322 arelativelysmall amount, such as one pound, whereupon the valve 424 should beclosed. When the pressure of the fluid in the brake cylinder reservoir322 is reduced, there will be a similar reduction in the pressure of thefluid in the chamber 56, and on this reduction, the diaphragm 52 shouldbe biased downwardly by the spring 53 so as to move the valve 58 to theopen position so that uid will flow from the chamber 60 to the chamber56 andtherefrom to the brake cylinder reservoir to restore the pressurein the brake cylinder reservoir and to again close the quick servicelimiting valve.

The next test is designed to test the return spring 26 of the serviceportion of the valve device, and'is begun with the valves 390,443, 399,41| and 429 open, the other numbered cocks or valves being closed, andthe handle 338 of the valve 335 in the position No. 3, which is the lapposition.

The handle 338 is now moved to the No. 1 position so as to supply iluidunder pressure kto the brake pipe reservoir 329, while the valves 409,382 and 311 are open. After the auxiliary reservoir 326 is charged tothe full pressure of 80 pounds, the valves 460 and 3821 are closed. Thevalve 318 should be partly opened at this time. When the valve 318isopen, fluid under pressure is permitted to escape from the pipe 352,which is connected to the pipe 313 which communicates by way of thepassage 291 in the bracket member 250 and the passage 486 in the llingpiece 415 with the passage 48 in the valve device. The passage 48communicates with a port in the seat of the slide valve 2|, and whentheA slide Valve is in the release position, as shown in Fig. 1 of thedrawings, communication is established between the valve chamber l1 andthe passage 48 by means of a port or passage in the slide valve. Onopening of the valve 318, therefore, iluid is vented from the valvechamber I1, and on the reduction in the pressure of the fluid in theValve chamber I1, the piston I3 is moved by the pressure of the fluid inthe piston chamber I5 to the left from the position in which it is shownin Fig. 1 of the drawings. On movement of the piston I6 to the left, theend of the piston stern 23 engages the piston 25 and moves this pistonagainst the pressure of the spring 26.

The operator is able to observe movements of the piston I5 by watchingthe end of the piston stop stem 233 through the window 265 in the covermember 298. When the piston I 6 is observed to moveto the retardedrecharge position,Y

that is, to the position to the left of the position in which it isshown in Fig. l of the drawings, the pressure'in the valve chamber I1,as indicated by the gage 386, and in the brake pipe line 388, asindicated by the gage 39|, should be observed. The difference betweenthese pressures is the pressure differential required to move the pistonto the retarded recharge position.

The valves 318 and 311 should now be closed and the valve 45| opened,thereby permitting fluid to ow from the main reservoir 325 to the.auxiliary reservoir 326 through the pipe 340, and

from the retarded recharge position, movement in this direction beingassisted by the spring 26. The pressure in the auxiliary reservoir,which is the same as that in the valve chamber I1, at the time thepiston I6 moves away from the retarded recharge position, will beregistered by the gage 385, and the pressure in the brake pipe at thistime will be shown by the gage 39|. The diierence in the pressuresacting on the piston I6 at the time the piston moves away from theretarded recharge position to the full charging position may then beobserved by the operator to determine whether the valve is in the properworking condition.

At the completion of this test the handle-338 of the valve 335 should bemoved to the No. 8 position to release fluid from the brake pipereservoir 329, and thegvalves 443 and 399 should be closed so as to cutofi the flow of iluid from the auxiliary and emergency reservoirs 32|)and 32|, respectively, While the valves 42|, 46| and 424 should beopened. As soon as the brake cylinder reservoir 322 has been reduced toatmospheric pressure all of the valves should be closed.

The testing of the service portion of the valve device is now completeand the valve device should be removed from the bracket member 250,while the filling piece 415 should also be removed.

Having completed the testing of the service portion of the valve device,the operator may now proceed with the testing of the emergency portionof the valve device as the test equipment provided by this invention isadapted for use in testing both the service and emergency portions ofthe valve device.

In order to test the emergency portion of the brake controlling valvedevice, the lling piece y

